Porosity Test Equipment

Dyne Testing offers portable pinhole and porosity testers ( also known as pore test instruments or holiday detectos) with continuously adjustable test voltage.  A very robust instrument for harsh use on construction sites or in manufacturing.

Fine pores or cracks cannot be completely avoided with any coating method.  With the POROSCOPE® you will find every crack – quickly and safely.  The test method is based on the fact that all electrically insulating coating materials have a much higher dielectric strength than air.  It is ideal for use on coated metals such as:

  • Enamel or plastic-coated mineral oil tanks, agitator kettles, pipelines, boilers and heat exchangers
  • Plastic-coated food packages
  • Corrosion protection coatings on hulls.




Three versions with different test voltage range available:

HV5     Portable pore test instrument with continuously adjustable test voltage 0.8 – 5kV
HV20     Portable pore test instrument with continuously adjustable test voltage 4 – 20kV
HV40     Portable pore test instrument with continuously adjustable test voltage 8 – 40kV



  • Intuitive operation with menu navigation, rotary push switch and OLED display.
  • Extensive selection of electrodes
  • Display  of the test voltage applied directly to the electrode
  • Pore detection sensitivity: detection threshold settable to a voltage drop of 10,20,30 or 50%
  • Porosity detector switchable between static and dynamic threshold
  • Battery operation by means of a Li-ion battery with smart battery technology, a controller monitors the battery state permanently and avoids deep discharge.
  • Voltage supply: 100 – 240 V~
  • Battery operation: at 40 kV: approx. 8 h continuous operation; at 20 kV: approx. 20 h continuous operation
  • Battery monitoring by means of smart battery technology
  • Dimensions [mm]: Supply unit: approx. 200 x 125 x 50; Test head: diameter approx. 120; Test head length: HV5: approx. 320; HV20: approx. 340; HV40: approx. 380
  • Weight [kg]: Supply unit: 1.4; Test head: HV5: approx. 0.9; HV20: approx. 0.94; HV40: approx. 1
  • Test voltage display: OLED graphic display
  • Test voltage display error: < 5 %

Packing List:

  • Measuring head
  • Supply unit with shoulder strap
  • Connection cable, length approx. 1.2 – 3mm
  • Ground cable, length approx. 10m
  • Power supply
  • Sturdy carrying case

Testing in accordance with:AS 3894.1, ASTM D4787, ASTM D5162, ASTM G62, EN 14430,  NACE SP0188, NACE SP0490, NACE SP0274


Order CodeDescription
65-HV5-604-959POROSCOPE HV5 – test voltage 0.7 – 5kV
65-HV20-604-958POROSCOPE HV20; test voltage 4 – 20kV
65-HV40-604-521POROSCOPE HV40; test voltage 8 – 40kV

Please read the electrode selection and the respective accessories on the datasheet on the Downloads tab or contact us for a quotation.